Improvement in molds for forming articles of rubber and other materials



w. B. GBE ANEALLE. Moldsfor Forming Articles of Rubber and other 1PatentedApril7,'1874.

UNITED STATES PATENT OFFICE.

WALLING D. GREANELLE, OF NEW YQRK, N. Y.

IMPROVEMENT IN MOLDS FOR FORMING ARTICLES 0F RUBBER AND OTHER MATERIALS-Specification forming part of Letters Patent No. 149.470, dated April 7,1874 application filed March 10, 1874.

To all whom it may cancer-n:

Be it known that I, WALLING D. GREA- NELLE, of New York, in the countyand State of New York, have invented an Improved Mold for Pipe=Bits andsimilar bent tubular articles of composition, of which the following isa specification:

My invention consists in the combination of a box or band, a die, and afollower with a bent rod or wire, serving as a core for the articles tobe molded from hard rubber or other composition.

In theaccompanying drawing, Figure 1 is a transverse vertical section.Fig. 2 is a longitudinal vertical section. Fig. 3 is a top view.

The box or band B is made of any suitable form, preferably square orrectangular. The die 0 and follower D are made to fit snugly in theband. The lower die 0 is formed with any desired number of depressionse, corresponding in form with one half of a pipe-bit. The follower D isformed with top dies f on its under side, corresponding in number andposition with the depressions e, and having in their faces depressionscorresponding with the other half of a pipe-bit. On two opposite sidesof the band B, at points opposite the termini of the depressions in thedies, are grooves g, for the reception of the ends of bent rods or wiresH, curved in a direction parallel with the outlines of the depressionsin the dies, which rods H form the cores for the articles to be molded.The bed or bottom die 0 is laid in a horizontal position, and the band Barranged so as to surround it. The composition is placed in thedepressions e in about half the quantity necessary to form the pipe-bit.The wires H are then placed in position, with their ends in the groovesg, and a further supply of the composition is placed over them, insufficient quantity to complete the formation of the pipe-bit. Thefollower D is then placed in the box and pressed down until the edges ofthe top dies f are in contact with the face of the bed-die O. Anysurplus composition which may be contained in the depressions is forcedout, and enters the spaces 2' on each side of and between the top diesf. When the composition has become sufficiently dry and hard, the band Bis removed, the follower D is lifted off, the wires H withdrawn, and thepipe-bit relieved of any burr which may exist thereon, after which it isready for use.

It will readily be seen that this apparatus need not be confined to themanufacture of pipe-bits, but may be applied to the molding of anydescription of bent tubular articles of composition, whether in plastic,powder, or fluid state.

I do not claim the formation or manufacture of articles from rubber orother compounds by molding, for such is well known and not my invention,which, as heretofore stated, consists solely in a peculiar constructionand arrangement of parts to form a mold.

What I claim as new, and desire to secure by Letters Patent, is-

In combination with the die 0 and follower D, having the depressions eand spaces 2', the recesses g 9, formed on the band B, for receiving andsupporting the opposite ends of the rods H, said rods forming the coresof the articles to be molded, substantially as de scribed.

, W. D. GREANELLE.

Witnesses:

VINCENT FITz SIMON, SAM. HARDOASTLE.

